Machine for making wire nails



(No Model.)

G. SGHULTZE.

MACHINE FOR MAKING WIRE NAILS- No. 556,589. Patented Mar. 17, 1896;

UNITED STATES VATENT OFFICE.

CHARLES SOHULTZE, OF BROOKLYN, NEW YORK.

MACHINE FOR MAKING WIRE NAILS.

SPECIFICATION forming part of Letters Patent No. 556,589, dated March17, 1896.

Application filed August 12, 1895. Serial NO- 553,994. (N0 model.)

T0 or whmn it may concern.-

Be it known that I, CHARLES SoHULTzE, a citizen of the United States,residing at Brooklyn, in the county of Kings and State of New York, haveinvented an Improvement in Machinery for Making WVire Nails, of whichthe following is a specification.

Nails have been made of wire both round and prismatic, and in someinstances prismatic wire has been twisted in the formation of nails, sothat such nails approximate the form of screws and partially revolvewhile being driven, and of course such nails hold more strongly thanplain nails because they cannot be easily withdrawn.

Difficulty has heretofore been experienced in forming the twisted wirenails because the operation of twisting has been separate and distinctfrom the manufacture of the nail and has increased the expense ofmanufacture.

In my present improvements the prismatic wire is twisted in the act offeeding the same to the heading mechanism,whereby a separate twistingoperation is avoided. In carrying out this improvement I apply to anyordinary nail-machine in which there is a feedingclamp, holding-jaws anda header, a twisting device composed of a die having a twisted holethrough which the wire passes, and the wire is pushed through thistwisted hole in the feeding operation, so that when it reaches theholding-dies it is ready to be headed and then subsequently to be outoff and is complete and ready for use.

In the drawings, Figure 1 is a diagram illustrating a nail-machine andthe place in which my improved twisting-die is located. Fig. 2 is anelevation of the twisting-die; and Fig. 3 is a plan view in larger size,showing the surface of one side of the twisting-die.

The holding-jaws A are adapted to be opened and closed, as innail-machines, and the header ]3 is adapted to be reciprocated so as tostrike up the head of the nail against the surface of the holding-jawsA, and the feed-clamp O is adapted to grasp the wire and carry the sameforward to feed the wire D to the holdingjaws, and such feed-clamp O isdrawn back over the wire to take a fresh hold at the time that theholding-jaws A clamp the wire and the head is being formed. These partsbeing common in nail-machines do not require further description herein.1, however, remark that the nail is cut off, after being headed, by anysuitable cutter, which at the same time points the nail. I haverepresented such a cutter at E.

My improved twisting-dieF is made of two parts and the one part isadvantageously fastened permanently to a cross-bar G, through which isan opening for the free passage of the twisted wire. The lower part 2 ofthis die F is represented with screws 3 for fastening such part 2 of thedie to the cross-bar G,

prism the opening through the twisting-die is triangular, and if thewire is four-sided the opening corresponds thereto; but instead of theopening or recesses being straight they are made with a twist, so thatthe two recesses form substantially a prismatic twisted hole, and theangle of inclination is to correspond to the angle of inclination in thetwist that is given to the wire, and of course such angle of inclinationcannot be too steep; otherwise the wire would be buckled between thefeedcla'mp and the twisting-die; and it is to be understood that alubricant may be applied to the wire as it passes through thetwistingdie, and that when the feed-clamp is moved forward toward thetwisting-die the wire D is carried thereby and pushed through theopening in the twisting-die, and in this operation the twist is impartedto the wire, so that when the holding-jaws A grip the wire near theadvancing end the wire of the nail has received the proper twist and theprojecting end of the wire is upset by the header and spread to form thehead of the nail. During this operation the feed-clamp C is drawn backthe proper distance for the length of another nail, and when theholding-jaws A are opened the feed-clamp O is again moved toward thetwisting-die and the wire twisted and the headed blank is free to rotateas the feed takes place, and the wire is projected beyond the cutter Ethe proper length for the nail. Such cutter E is closed to cut off thewire and form the point of the nail and usually a sufficient length ofwire is allowed to project from the holdingjaws A for forming the headof the next nail, and such holding-j aws A close upon the wire and thehead is formed upon the wire by the header B and the operations arerepeated.

By adjusting the screws 5 and 6 the opening through the twisting-die maybe made wider or narrower and the angle of twist given to the wire canthereby be slightly varied, and it will be apparent that thetwisting-die can easily be changed upon the nailmachine so as to adaptthe same to different sizes or shapes of wire without the other portionsof the machine being materially altered.

I claim as my invention 1. The combination with the feeding-clamp,holding-jaws and cutting and heading devices, of a two-part stationarydie with inclined recesses in its faces for twisting a prismatic wire asit is forced through the die, and mechanism for adjusting the two partsof the twisting-die to Vary the twist in the nail-wire, substantially asspecified.

2. In a nail-making machine, the combination with the feeding, holding,heading and cutting mechanism, of a stationary twistingdie between thefeeding mechanism and the holding mechanism for imparting to theprismatic wire a twist as it is fed through the twistin g-die to theheading and cutting mechanism, substantially as set forth.

Signed by me this 8th day of August, 1895.

CHARLES SOIIULTZE.

\Vitnesses:

GEO. '1. PINCKNEY, S. T. ITAVILAND.

